UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 6-K Report Of Foreign Private Issuer Pursuant To Rule 13a-16 Or 15d-16 Of The Securities Exchange Act Of 1934 For the month of May 2025 Commission File Number: 001-14950 ULTRAPAR HOLDINGS INC. (Translation of Registrant's Name into English) Brigadeiro Luis Antonio Avenue, 1343, 9 th Floor São Paulo, SP, Brazil 01317-910 (Address of Principal Executive Offices) Indicate by check mark whether the registrant files or will file annual ...